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developerWorks: The Push for Clustering

"Clustering allows an application server to support multiple
nodes with failover, session data sharing, and load balancing
across many network nodes. This article provides details, direct
from the Apache Geronimo clustering effort team leader, Jeff
Genender, on the clustering technologies the team is considering
implementing. Find out who is working on the details, how they work
together to get the code written, and the ramifications these
efforts are having on the open source community..."